If you are a traveler, you must know about cameras and their lens.
Lens Nomenclature in the case of SIGMA.
The acronyms (DG, DC, DN) are found on SIGMA lenses which represents its frame size. DG = Full Frame, DC = Crop Sensor, DN = Made for Mirrorless.
EF-M stands for Electro-focus mirrorless and is a dedicated lens mount for Canon's compact system cameras, the EOS M-series. EOS M cameras accept EF-M lenses directly
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